Video Experimental Relacionado
Updated: Jul 10, 2026
08:51
Microinjection for Transgenesis and Genome Editing in Threespine Sticklebacks
Published on: May 13, 2016
Diversificación de los genes de la superfamilia Ig en un invertebrado
Si-Ming Zhang1, Coen M Adema, Thomas B Kepler
1Department of Biology, University of New Mexico, Albuquerque, NM 87131, USA.
Science (New York, N.Y.)
|July 13, 2004
Resumen
Los caracoles de agua dulce diversifican las proteínas relacionadas con el fibrinógeno (FREP) en su sistema inmunológico. El análisis genómico revela una rápida evolución de los genes FREP3, lo que sugiere un mecanismo de defensa único en estos invertebrados.
Área de la Ciencia:
- * Inmunología de los invertebrados.
- * Evolución molecular * Evolución molecular
- * La genómica es la genómica.
Sus antecedentes:
- * Los caracoles de agua dulce como * Biomphalaria glabrata * tienen proteínas relacionadas con el fibrinógeno (FREPs).
- * Las FREP son proteínas hemolinfáticas con la superfamilia de inmunoglobulinas (IgSF) y dominios de fibrinógeno, cruciales para la defensa interna.
Objetivo del estudio:
- * Para investigar la diversificación genómica de la subfamilia FREP3 en Biomphalaria glabrata.
- * Comprender los mecanismos evolutivos que impulsan la diversidad de moléculas inmunes en los caracoles.
Principales métodos:
- * Análisis genómico comparativo de los genes FREP3.
- * Análisis de secuencias para identificar mutaciones puntuales y eventos de recombinación.
- * Análisis del transcriptoma para evaluar la diversidad de expresión génica de FREP3.
Principales resultados:
- * El dominio IgSF1 de la subfamilia FREP3 exhibe tasas de diversificación aceleradas en comparación con los genes de control.
- * Las variantes de secuencia se originan a partir de un conjunto limitado de nueve secuencias de origen a través de la mutación y la recombinación.
- * Se generan diversas transcripciones de FREP3, lo que indica una regulación génica compleja.
Conclusiones:
- * *Biomphalaria glabrata* posee un sofisticado mecanismo para diversificar las moléculas inmunes a nivel genómico.
- * La rápida evolución de los genes FREP3 probablemente mejora las capacidades de defensa interna del caracol.
- * Este estudio proporciona información sobre la base molecular de la adaptabilidad del sistema inmunológico de los invertebrados.
Videos de Conceptos Relacionados
01:33Pleiotropy
Pleiotropy is the phenomenon in which a single gene impacts multiple, seemingly unrelated phenotypic traits. For example, defects in the SOX10 gene cause Waardenburg Syndrome Type 4, or WS4, which can cause defects in pigmentation, hearing impairments, and an absence of intestinal contractions necessary for elimination. This diversity of phenotypes results from the expression pattern of SOX10 in early embryonic and fetal development. SOX10 is found in neural crest cells that form melanocytes,...
01:57Gene Families
Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
02:47Protein Families
Protein families are groups of homologous proteins; that is, they have similarities in amino acid sequences and three-dimensional structures. Protein families usually occur because of gene duplication, where an additional copy of a gene is inserted into the genome of an organism. Mutations that change the amino acids but still allow the protein to be properly synthesized, will lead to new protein family members. If these new proteins contain similar amino acids in key locations, protein...
02:51Multi-species Conserved Sequences
Next-generation sequencing technologies have created large genomic databases of a variety of animals and plants. Ever since the human genome project was completed, scientists studied the genome of primates, mammals, and other phylogenetically distant living beings. Such large-scale studies have provided new insights into the evolutionary relationship between organisms.
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved DNA...
Although the genome of each species varies greatly from each other, a few sequences are highly conserved. Such conserved DNA...
02:37Gene Duplication and Divergence
The seminal work of Ohno in 1970 popularized the idea of gene duplication and divergence. DNA sequence comparison studies reveal that a large portion of the genes in bacteria, archaebacteria, and eukaryotes was generated by gene duplication and divergence, indicating its critical role in evolution.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
The duplicated copies of the gene are called Paralogs. Paralogs with similar sequences and functions form a gene family. Across several species, a large number of gene families are characterized.
01:57Gene Families
Gene families consist of groups of genes proposed to have originated from a common ancestor. Typically these arise through events in which a gene or genes are mistakenly duplicated during cell division. Unlike their parent genes (which are subject to selection pressure to maintain function), these gene copies do not need to preserve their sequences and may evolve at a relatively faster rate.
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...
Occasionally these regions can be adapted to take on new roles within the organism, becoming novel genes...